EP1039324A1 - Leitungsführungsanordnung für Verbinderstecker - Google Patents

Leitungsführungsanordnung für Verbinderstecker Download PDF

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Publication number
EP1039324A1
EP1039324A1 EP99105056A EP99105056A EP1039324A1 EP 1039324 A1 EP1039324 A1 EP 1039324A1 EP 99105056 A EP99105056 A EP 99105056A EP 99105056 A EP99105056 A EP 99105056A EP 1039324 A1 EP1039324 A1 EP 1039324A1
Authority
EP
European Patent Office
Prior art keywords
guide plate
sealing
guide plates
grooves
ferrule
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99105056A
Other languages
English (en)
French (fr)
Inventor
Johannes Haftmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates GmbH
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates GmbH
WL Gore and Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WL Gore and Associates GmbH, WL Gore and Associates Inc filed Critical WL Gore and Associates GmbH
Priority to EP99105056A priority Critical patent/EP1039324A1/de
Publication of EP1039324A1 publication Critical patent/EP1039324A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3861—Adhesive bonding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G02B6/3838—Means for centering or aligning the light guide within the ferrule using grooves for light guides
    • G02B6/3839—Means for centering or aligning the light guide within the ferrule using grooves for light guides for a plurality of light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3865—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using moulding techniques
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
    • G02B6/3821—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with axial spring biasing or loading means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type

Definitions

  • the invention relates to a guiding device for the conductors in a connector plug and a connection system incorporating the connector plug. Most preferably the guiding device is used in an optical fibre connector plug.
  • a multi-fibre optical fibre connector plug is known from European Patent Application EP-A-0 514 722 (NT&T).
  • the ferrule shown in this prior art has a plurality of optical fibres whose endfaces extend beyond a front facet of the ferrule. When two of the said ferrules are placed in contact with each other the endfaces of the optical fibres come into contact with each other such that light waves passing along one optical fibre in one ferrule is transmitted to the corresponding optical fibre in the other ferrule.
  • a further optical fibre connector plug is shown in US-A-4 973 127 (Cannon et al) assigned to AT&T Bell Laboratories.
  • the ferrules used in the connector plug of this disclosure include a plurality of small fibre grooves for accepting the optical fibres and larger pin grooves for accepting guide pins to join two ferrules together. Furthermore each ferrule includes a nose projecting beyond the front facet of the ferrule for facilitating the connection of the optical fibres to each other.
  • the optical fibre connector plug of US-A-4 973 127 has an upper and lower guide plate which touch each other.
  • optical fibre connectors are known from US-A-3 864 018 (Miller), US-A-4 029 390 (Chinnock et al), US-A-4 279 468 (Turley et al.), US-A-4 657 341 (Sammueller), US-A-4 818 058 (Bonanni), US-A-4 830 456 (Kakii et al.), US-A-3 836 638 (Finzel), US-A-4 865 413 (Hübner et al.), US-A-4 898 449 (Vroomen et al.).
  • the ferrules use guiding pins to ensure that when the two adjacent ferrules are connected together, their endfaces match.
  • the ferrules are provided with guiding pin holes to accept the guiding pins.
  • the guiding pin hole is formed from guiding pin grooves constructed in the guide plates.
  • a ferrule having two guide plates (an upper and a lower guide plate). On the top surface of each of the guide plates at least one sealing lip and at least one sealing groove are formed between which are situated a plurality of transmission line grooves in which signal transmission lines (such as optical fibre conductors or copper conductors) are placed.
  • the two guide plates are so matched such that when the top surfaces of the guide plates are placed adjacent to one another, the plurality of grooves in the upper guide plate aligns with the plurality of grooves in the bottom guide plate, and the sealing lip in one of said guide plates is accepted by, i.e. fits into, the sealing groove in the other of said guide plates.
  • the top surfaces of the guide plates do not touch each other except through the co-operation of the sealing lip and the sealing groove. This allows for self-alignment of the guide plates when they are placed adjacent to each other and also compensates for different size transmission lines.
  • each guide plate has one sealing lip and one sealing groove.
  • the respective top surfaces of the guide plates are placed adjacent to but not in contact with each other A cavity is thus formed between the sealing lips within the ferrule which can be filled with an adhesive to attach the two guide plates together and affix the signal transmission lines within the ferrule.
  • the sealing lips and the corresponding sealing grooves prevent the outflow of adhesive from the cavity. This creates a ferrule in which low transmission losses are found.
  • each guide plate has two sealing lips and two sealing grooves separated by the plurality of transmission line grooves.
  • the guide plates are therefore identical and can be manufactured in the same mould using substantially the same process conditions. This reduces substantially the tolerances in the system and allows extremely small structures to be created.
  • a guiding pin groove is provided in the top surface to allow a guiding pin to be incorporated into the manufactured ferrule so that two adjacent ferrules can be aligned with each other.
  • the guide plates of the ferrule can also include a projection and a corresponding receptacle which provide means for aligning the two guide plates to each other.
  • the sealing lips are adjacent to the sealing groove and the height of the scaling lip is at least three times the width of the sealing lip. This allows the sealing lip to have a certain degree of flexibility so that when it is fitted into or accepted by the sealing groove, its top can bend on touching the side of the sealing groove. Since the top and the side wall of the sealing groove are then in contact with each, there is no opportunity for the adhesive from within the cavity of the assembled ferrule to flow through the groove to the outside of the ferrule.
  • the guide plates are made of a plastic material which is not brittle and thus leads to more robust ferrules.
  • the ferrule of the invention can find application in an optical fibre connection system in which a plurality of optical fibres is placed in the transmission line grooves and the optical fibre connector is formed from the ferrule.
  • Fig. I shows a ferrule 10 or a conductor guiding device according to this invention for optical fibres 15 or other signal transmission lines such as an electrical signal wire.
  • the ferrule 10 is made from an upper guide plate 20a and a lower guide plate 20b and has an end face 17.
  • the upper guide plate 20a has a top surface 25a which on assembly of the ferrule 10 is placed adjacent to a top surface 25b of the lower guide plate 20b.
  • the top surfaces 25a and 25b are not directly in contact except by means of sealing lips 40 as will be explained later.
  • the upper guide plate 20a and the lower guide plate 20b have side edges 27.
  • the upper guide plate 20a and the lower guide plate 20b are manufactured in the preferred embodiment of the invention by plastic injection moulding techniques as described later.
  • the upper guide plate 20a and the lower guide plate 20b could also be manufactured from silicon or another material by an etch process using techniques known in the art.
  • Possible plastic materials for manufacture of the ferrule 10 include polymer materials such as a liquid crystalline polymer (LCP), for example LCP Vectra A 625, Vectra A 530 or LCP Vectra C 950, poly(butylene terephthalate) (PBT), such as Celanex 2000-3, polyoxymethylene (POM), such as Ultraform Z 23200003, poly(phenylene ether) (PPE), such as Luranyl Kr 2451/1, poly(phenylene sulfide) (PPS), such as Ryton BR 102 or Ryton EXP 144, poly(ether sulfone) (PES), such as Ultrason KR 4110, poly(ether imide) (PEI), such as Ultem CRS 5001 or Ultem 1010 R, poly(ether ether ketone) (PEEK), such as Victrex
  • FIG. 2 shows an end view of the ferrule 10 of the invention. It can be seen from this figure that the upper guide plate 20a and the lower guide plate 20b of the invention are rotationally symmetrical about a rotational axis of symmetry 12 situated in the centre of the assembled ferrule 10 between the upper guide plate 20a and the lower guide plate 20b.
  • Fig. 3 shows a perspective view of the ferrule 10 of the invention.
  • Each of the guide plates 20a, 20b has a plurality of fibre optic grooves 30 into which the optical fibres 15 are placed.
  • the fibre optic grooves 30 are shown as having a v-shape, however, other shapes are conceivable.
  • twelve fibre optic grooves 30 are shown to accept twelve optical fibres 15. This is in accordance with European Standard EN 186240 from 1994 for the MT fibre optic connector.
  • a different number of fibre optic grooves 30 could be used without detracting from the principle of the invention. It should be noted, however, that in order to preserve the symmetry of the upper guide plate 20a with the lower guide plate 20b, an even number of fibre optic grooves 30 must be provided and, indeed, this is specified by the European Standard EN 186240.
  • a sealing lip 40 is provided on one side of the plurality of fibre optic grooves 30, a sealing lip 40 is provided and on the other side of the plurality of fibre optic grooves 30, a corresponding sealing groove 50 is provided.
  • the sealing lip 40 has a tip 42, side walls 45a, 45b, a width 47 and a height 49.
  • the sealing groove 50 has groove side walls 55a, 55b.
  • the sealing lip 40 and the sealing groove 50 are matched such that when the top surface 25a of the upper guide plate 20a is placed in contact with a top surface 25b of the lower guide plate 20b, the sealing lip 40 of the upper guide plate 20a fits into the corresponding deep grove 50 of the lower guide plate 25b.
  • the sealing lip 40 of the lower guide plate 20b fits into the corresponding deep groove 50 of the upper guide plate 20a.
  • pin grooves 70 are constructed to accept guide pins 60 when two ferrules 10 are placed together.
  • the pin grooves 70 are provided at their bottom with an indent 80 whose purpose is to aid in locating the position of the guide pin 60 within the pin groove 70 on assembly of the upper guide plate 20a with the lower guide plate 20b.
  • a projection 90 is formed on the upper surface 25.
  • a receptacle 100 is formed between the other of the side edges 27 and the other of the pin grooves 70.
  • the projection 90 and the receptacle 100 are matched with each other such that on assembly of the ferrule 10 the projection 90 of the upper guide plate 20a is accepted by the receptacle 100 of the lower guide plate 20b and similarly the projection 90 of the lower guide plate 20b is accepted by the receptacle 100 of the upper guide plate 20a.
  • the projection 90 and the receptacle 100 serve to align the upper guide plate 20a with the lower guide plate 20b on assembly of the ferrule 10.
  • the ferrule 10 is assembled by placing an adhesive 85 on the surface of the lower guide plate 20b.
  • the optical fibres or other signal transmission lines 15 are placed in the fibre optic grooves 30 of the lower guide plate 20b.
  • the upper guide plate 20a is then placed on the lower guide plate 20a such that the projections 90 matches up with the corresponding receptacles 100 and the sealing lips 40 match with the corresponding sealing grooves 50.
  • the adjacent surfaces of the upper guide plate 20a and of the lower guide plate 20b do not touch each other over their whole area. The only point of contact is from the co-operation of the sealing lip 40 and the sealing groove 50.
  • the effect of the co-operation of the sealing lips 40 and the sealing grooves 50 is to create an additional space within the ferrule 10 into which the adhesive 85 is placed to bind the optical fibres 15 within the ferrule 10 and the upper guide plate 20a to the lower guide plate 20b.
  • the sealing lips 40 and the sealing grooves 50 co-operate to ensure that no adhesive leaks into the area of the pin groove 70.
  • a number of adhesives can be used in the ferrule 10.
  • Examples are cyanacrylate such as Loctite 401 and Loctite 480, polyimide such as Epo-Tek 390, one component epoxy such as Epo-Tek 353 ND-frozen, two component epoxy such as TRA-BOND F123, Epo-Tek 353ND, Epo-Tek 353ND-T, Epo-Tek 301, Epo-Tek 302-3M, Epo-Tek 354, Epo-Tek 360, an ultra-violet light curable adhesive such as Tra-Bond F196, Master Bond UV-15-7, UV 15-7DC, Vitralit 6102, NEA 121, an ultra-violet light curable cationic adhesive such as Vitralit 1722, Vitralit 1731, Delo Katiobond 4552, Delo Katiobond 4557, Delo Katiobond 4594, or a hot melt adhesive such as Bostik Supergrip 2000-9810.
  • polyimide such as Epo-Tek 390
  • one component epoxy such as Epo-Tek 353
  • the end face 17 of the ferrule 10 can be polished, for example, in accordance with the techniques described in applicant's co-pending European Patent Application No EP 96 118 370.
  • Fig. 4 shows a blow-up view of the area marked A on Fig. 2 of the end face 17 of the ferrule 10 on assembly and allows a better understanding of the sealing principle. It will be observed from Fig. 4 that the tips 42 of the sealing lips 40 do not exactly match the bottoms 52 of the sealing grooves 50. Rather on assembly of the ferrule 10, the tip 42 of the sealing lip 40 hits one of the groove side walls 55 of the sealing groove 50. The width 47 of the sealing lip 40 is substantially smaller than the sealing lip height 49 of the sealing lip 40. Thus the sealing lips 40 can bend in the direction shown by the arrows in Fig. 4 such that the sealing lip tips 42 are in direct contact with the groove side walls 55 and thus form a seal for the adhesive when it is inserted into the space between the upper guide plate 20a and the lower guide plate 20b.
  • Fig. 4 shows the dimensions of the sealing lip 40 and the sealing groove 50 in one embodiment of the invention. These dimensions are illustrative of one advantages embodiment of the invention in which the orthogonal or side forces between the side walls 45a, 45b of the sealing lip 40 and the groove side wall 55a of the sealing groove 50 are minimised. Other dimensions could be used and the dimensions given here are not intended to be limiting. It is seen that the side walls 45a, 45b of the sealing lip 40 have an angle of 1.0° from the normal to the top surface 25 whilst the groove side wall 55a adjacent to the sealing lip 40 has an angle of 7.0° from the normal to the top surface 25 and the other groove side wall 55b is normal to the top surface 25. The tip 42 of the sealing lip 40 is rounded as is the bottom 52 of the sealing groove 50 to allow easy assembly of the ferrule 10.
  • the ferrule 10 is made in two halves using an injection moulding method as is shown in Figs. 5a to Fig. 5c.
  • This comprises a mould 500 with an ejector side 510 and an injection side 520.
  • the ejector side 510 has ejector pins 512a and 512b which are inserted through the ejector side 510 to a mould insert cavity 516 which accepts a first mould insert 517 having a back side 518 and a front side 519.
  • the ejector side 510 furthermore contains heating elements 515.
  • the injection side 520 has heating elements 522 and a passageway 525 through the injection side 520 leading to a second mould insert 527.
  • An opening 528 to the passageway 525 accepts an end 533 of a barrel 530 for injecting the plastic into the mould 500.
  • the barrel 530 has a passageway 535 through which molten plastic is injected to the end 533, into the mould 500 and consequently pressed into the mould cavity 516.
  • Fig. 5a shows the mould 500 prior to commencement of the injection moulding process.
  • the first mould insert 517 for one of the upper guide plate 20a or the lower guide plate 20b of the ferrule 10 is inserted into the mould insert cavity 516.
  • the ejector pins 512a, 512b are so positioned that they pass through the back side 518 of the mould insert 517 to the front side 519 of the first mould insert 517. Their function will become clearer later.
  • the ejector side 510 and the injection side 520 are brought together as shown in Fig. 5b and the end 533 of the barrel 530 is placed in the opening 528 of the passageway 525.
  • molten plastic is injected through the passageway 535 of the barrel 530 into the passageway 525 of the injection side 520 and thus pressed into the cavity 540 formed between the first mould insert 517 and a second mould 527.
  • Ventilation channels which are not shown on these figures allow escape of the air from the cavity 540 during the moulding process.
  • the ejector side 510 and the injection side 520 are heated during the moulding process by means of the heating elements 515 and 522 respectively.
  • the end 533 of the barrel 530 is subsequently withdrawn from opening 528 of the passageway 525.
  • the ejector side 510 and the injection side 520 are separated from each other as shown in Fig. 5c.
  • the guide plate 20a, 20b thus moulded is removed from the mould insert cavity 516 by means of the ejector pins 512a, 512b and then removed from the ejector pins 512a, 512b.
  • the stub 550 attached to the bottom 555 of the guide plate 20a, 20b is removed.
  • Using the same first mould insert 517 and the matching upper guide plate 20a and lower guide plate 20b of a ferrule 10 can be constructed.
  • the ferrule 10 of the invention is used, for example, in a connection system 600 such as shown diagrammatically in Figs. 6a and 6b and which is obtainable from US Conec, Hickory, North Carolina, US, under the name MTP Push-on connector.
  • Fig. 6 shows only one half of the connection system 600.
  • An adapter 650 is used to connect two halves of the connection system 600 together.
  • Each half of the connection system 600 comprises an end piece 604, a crimp ring 605, a spring push 610, a spring 615, a pin clamp 620, a coupling element 630.
  • the pin clamp 620 has a rear end 627 and a front end 629 as well as an opening 625 through which the fibre optic cable 15 passes.
  • the ferrule 10 is placed in front of the pin clamp 620 such that the fibre optic cable 15 extends from the rear end 627, i.e. the end facing the spring push 610.
  • the ferrule 10 is surrounded and guided by the coupling element 630 and the front facet 40 emerges from the front end of the coupling element 630.
  • the spring 615, the spring push 610 are slid over the fibre optic cable 16 and an outer jacket of the cable 16 together with a strength member in the jacket are clamped in place by means of the crimp ring 605..
  • the end piece 604 and the coupling element 630 are then assembled over the construction.
  • the coupling element 630 includes a key 634 for ensuring that the one half of the connection system 600 is inserted correctly in the adapter 650.
  • the coupling element 630 further includes a depression 632 which co-operates with a latch 655 on the adapted to hold the half of the connection system in the adapter 650
  • Fig. 6b shows one half of the connection system 600 mounted together with the adapter 650.
  • the ferrules 10 in both halves of the connection system 600 are mounted such that when the halves of the connection system 600 are held in the adapter 650 the respective front facets 17 of the ferrule 10 abut each other.
  • the spring 615 applies sufficient force to the ferrule 10 such that the ferrule 10 is compressed and the front faces of the optical fibres 15 are in direct contact with each other.
EP99105056A 1999-03-23 1999-03-23 Leitungsführungsanordnung für Verbinderstecker Withdrawn EP1039324A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99105056A EP1039324A1 (de) 1999-03-23 1999-03-23 Leitungsführungsanordnung für Verbinderstecker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99105056A EP1039324A1 (de) 1999-03-23 1999-03-23 Leitungsführungsanordnung für Verbinderstecker

Publications (1)

Publication Number Publication Date
EP1039324A1 true EP1039324A1 (de) 2000-09-27

Family

ID=8237764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105056A Withdrawn EP1039324A1 (de) 1999-03-23 1999-03-23 Leitungsführungsanordnung für Verbinderstecker

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6644864B2 (en) 2002-03-14 2003-11-11 International Business Machines Corporation Stacked optical coupler
WO2014136848A1 (ja) * 2013-03-07 2014-09-12 住友電気工業株式会社 光接続器
JP2016095345A (ja) * 2014-11-12 2016-05-26 日本通信電材株式会社 光コネクタフェルールの製造装置及び方法、光コネクタフェルール
JP2016142951A (ja) * 2015-02-03 2016-08-08 富士通コンポーネント株式会社 光コネクタ
EP3088926A1 (de) * 2015-04-30 2016-11-02 Sanwa Denki Kogyo Co., Ltd. Optische steckerhülse
WO2024024348A1 (ja) * 2022-07-28 2024-02-01 古河電気工業株式会社 フェルール、フェルールの製造方法、フェルール付きファイバリボン及びフェルール付きファイバリボンの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2007867A (en) * 1977-11-04 1979-05-23 Thomas & Betts Corp Fibre optic connectors
US4973127A (en) * 1989-05-31 1990-11-27 At&T Bell Laboratories Multifiber optical connector and method of making same
JPH05323154A (ja) * 1992-05-26 1993-12-07 Fujikura Ltd 光ファイバ接続用コネクタ
EP0860721A1 (de) * 1993-03-31 1998-08-26 Sumitomo Electric Industries, Ltd. Optisches Faserarray

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2007867A (en) * 1977-11-04 1979-05-23 Thomas & Betts Corp Fibre optic connectors
US4973127A (en) * 1989-05-31 1990-11-27 At&T Bell Laboratories Multifiber optical connector and method of making same
JPH05323154A (ja) * 1992-05-26 1993-12-07 Fujikura Ltd 光ファイバ接続用コネクタ
EP0860721A1 (de) * 1993-03-31 1998-08-26 Sumitomo Electric Industries, Ltd. Optisches Faserarray

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 142 (P - 1706) 9 March 1994 (1994-03-09) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6644864B2 (en) 2002-03-14 2003-11-11 International Business Machines Corporation Stacked optical coupler
WO2014136848A1 (ja) * 2013-03-07 2014-09-12 住友電気工業株式会社 光接続器
JP2016095345A (ja) * 2014-11-12 2016-05-26 日本通信電材株式会社 光コネクタフェルールの製造装置及び方法、光コネクタフェルール
JP2016142951A (ja) * 2015-02-03 2016-08-08 富士通コンポーネント株式会社 光コネクタ
US10094983B2 (en) 2015-02-03 2018-10-09 Fujitsu Component Limited Optical connector
EP3088926A1 (de) * 2015-04-30 2016-11-02 Sanwa Denki Kogyo Co., Ltd. Optische steckerhülse
US9684137B2 (en) 2015-04-30 2017-06-20 Sanwa Denki Kogyo Co., Ltd. Optical connector ferrule
WO2024024348A1 (ja) * 2022-07-28 2024-02-01 古河電気工業株式会社 フェルール、フェルールの製造方法、フェルール付きファイバリボン及びフェルール付きファイバリボンの製造方法

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